Should I Paint It?

Novacastrian:How about use whatever the heck you can get your hands on?frankrede:Well then I guess it won't matter when you decide to drink bleach because your out of kool-aid....I'm sorry, but that made my year.

I think sprinkler valves have been hydro-tested to 400 psi. I wouldn't go anywhere near that though. Flaws and defects do occur quite often.

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Novacastrian:How about use whatever the heck you can get your hands on?frankrede:Well then I guess it won't matter when you decide to drink bleach because your out of kool-aid....I'm sorry, but that made my year.

Thanks for the notes on the pressure, do know that It will never get charged higher than 125-150 PSI. I Manage a truck garage and am very familiar with what happens with excess, uncontrolled power. Bearing that in mind, you should never reach more than 85% load capacity for fear of invisible stess damage - it adds up fast.

The flow corrector works on the theory of air dispersion, the same thing that keeps a hovercraft afloat a blanket of air. The pressure of the air underneath these vehicles is spread over a great surface area, giving even dispersion of lifting power. The flow corrector does the same - take a look at these diagrams I sketched up - you will see that that it is very similar in nature to the dispersion method of a hovercraft, rather this design focuses on making the flow uniform and unidirectional, thus rendering more initial power. Disney uses this same design in their water fountains that shoot perfectly tubular streams of water through the air without loosing surface tension and maintaining a floating "tube" of water. This is because the fluid (liquid or gas) is travelling uniformly as it is expelled.

BTW- That orange tip was just the thread protector that came with the tube stock. It is a 1" diam. Barrel. I have plans to rifle either a steel or ABS barrel at a local machine shop or perhaps remington arms factor, which is about 3 miles away from where I work.

Side note : My friend, a mechanical engineeer, stakes that this steel tubing would take in upwards of 800 - 1000 PSI of pressure, making it ideal for either pneumatic or combustion purposes. This Is the third cannon that I havfe built. The first two were constructred with my engineering friend, Ryan, LordDarPhyve. Both were steel, one pneumatic and one propane/flint combustiuon. The thought of rupturing plastic makes me shudder. I absolutely refuse to use a material that stresses with heat, cold, chemicals, sunlight, etc...

You guessed it - drinking straws crammed into a small 1" dia pipe with a retaining screen to keep them arranged properly. You would notice a slight twist in the arrangement if looking on from the front.

The compressor was purchased at harbor freight tools. I actually used components from two different compressors, but the the motor and pump assembly came from same unit. The guage in the compressor housing came from another small compressor. One would have been enough but I thought the fit was better with the other guage. There were several to choose from, and unfortunatly, they only had the twenty dollar version, so I bought that. A week after dismantling it, I found another at work... Figures. You can get one of these for 5 bucks on sale at harbor freight or order one offline at this link:

CLICK FOR INFOI was entertaining the thought of using the other compressor as well, to cut the "charging" time in half. Likewise, that would also cut battery time in half if I did decide to add an onboard power source.

imablackskater wrote:Im working on a gun that has a reg on it like yours but I'm not shure if it is a reg since i looked inside it and it looks like a ball valve with a gauge on it to me.

You should check the packagine it came with, or test it for functionality, The reg I used can also be purchased at harbor freight tools, at a relatively low cost. You will have to modify it, however. The air couplings on my reg were incompatible withe the barbs and hose i was using, and since I had to adapt it, I had to use a tap and die set to turn several adapter pieces. Take the time to shop for the right components... it pays off. It took me almost four months in my spare time to finish this beast.

LoganPhyveÜberComputer Studios, Ltd."Seamless Technology Integration"

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Last edited by loganphyve on Thu Mar 15, 2007 8:51 pm, edited 1 time in total.

Very, very, nice! I like metal guns, especially the ones with an onboard compressor. I've tried one similar to that, about 9 volts, and it couldn't really pump up my pneumatic (2 chambers joined by a tee) past 30 psi

Have you thought of modding the blowgun valve? It helps it dump the air a lot faster. I really like the flow corrector thing, I will definitely have to try it, I may even put it in my current pneumatic. I think you should paint it black with red fittings

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sgort87 wrote:I hereby present Flying_Salt with The one and only <a href="http://www.geocities.com/sgort87/ghetto">Ghetto Award!</a>

Flying_Salt wrote:Have you thought of modding the blowgun valve? It helps it dump the air a lot faster.

I do not believe a modification would be absolutely necessary... The trigger used here is not a blowgun, rather a remote tire filler for big trucks. It is specifically designed to A) have a higher airflow due to less restriction (it has no blowgun style venturi), and B) hold pressure in both directions.

If you look in the phioto album link in my first post, you can see several other ports that are capped off which had extraneous pieces and/or parts threaded in.<a href="http://picasaweb.google.com/bradford.gorea/SpudCannon/photo#5037935044293830482"><img src="http://lh6.google.com/image/bradford.gorea/RepXOwygJ1I/AAAAAAAAAEU/hxgTYOdH6I0/s144/03-03-07_2005.jpg"></a>LoganPhyveÜberComputer Studios, Ltd."Seamless Technology Integration"